User's Manual

SBS
-
900 Shore
Ba
Ba
sed
Radar Systems
Chapter
10
10
:
Corrective maintenance
KH
KH
-
1602 2
issue 1
:
Standard SBS900 Systems Operator & Maintenance Handbook
Page
216
of
240
Fan
replacement
Health and safety
notice
WARNING
:
Prior to commencing any maintenance
procedure
, users must familiarise
themselves with the health
&
safety warnings noted in the planned maintenance
and
health and safety
section
s
of the system handbook.
Prior to carrying out
planned maintenance, t
he system must be
fully isolated and
disconnected
from the single and 3
-
phase AC supplies
. See
system isolation
in the
planned maintenance section of the system handbook.
Replacement fan part number
: NTX
-
A518 (
fan and cable but not t
he plastic enclosure
).
The Toshiba VF
-
S11 inverter is
located with
in the radar distribution
unit (RDU).
The inverter is a sealed unit that
contains no field serviceable or
repairable parts.
The unit must never be dismantled
or repaired in the field.
Toshiba VF
S11 inverter
Radar distribution unit
Warning:
When powered
lethal voltages are present
within the inverter
.
Inverter removal:
To replace the fan, the inverter will need to
b
e removed from the radar distribution
unit.
See section
9.6
page
100
for the inverter removal instructions.
When the inverter has been removed, the fan can
be accessed at the base of the unit.
The fan assembly is retained by two clips which
are released by p
ressing towards the centre of
the fan.
The fan assembly can now be removed.
Disconnect the power connector from the
inverter.
Fan assembly removal
Fan power disconnection
Noting the orientation and
direction, the fan can now be
removed from
the plastic
case and the replacement
fan fitted.
The fan is retained in the
case by 4 plastic clips.
The fan assembly can now
be reconnected/ refitted and
the inverter replaced into the
RDU.